Why Do Bridges Arch? Level 3 Factbook

Code: 9780521137171
cena od: 21,85 
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Opis produktu

A series of twenty non-fiction science readers which engages children in the world around them. What holds up skyscrapers? Why are sports domes curved? Why are triangles used in many bridges? You can find the answers to these and other questions about structures in Why Do Bridges Arch?